webcam

#include "opencv2/opencv.hpp"

#include <iostream>

using namespace std;

using namespace cv;

int main() {

VideoCapture vcap(0);

if (!vcap.isOpened()) {

cout << "Error opening video stream or file" << endl;

return -1;

}

int frame_width = vcap.get(CV_CAP_PROP_FRAME_WIDTH);

int frame_height = vcap.get(CV_CAP_PROP_FRAME_HEIGHT);

VideoWriter video("out.avi", CV_FOURCC('M', 'J', 'P', 'G'), 10, Size(frame_width, frame_height), true);

for (;;) {

Mat frame;

vcap >> frame;

video.write(frame);

imshow("Frame", frame);

char c = (char)waitKey(33);

if (c == 27) break;

}

return 0;

}